Switch-lock.



PATENTED JUNE IG 13G? W. ANDERSON. SWITGH LOOK. APPLICATION PILBQAPR.11,1907.

2 SHEETS SHEBT Z.

Sad manta:-

-- .Z'o all whom it may concern:

1 Memphis, in'the county of of Tennessee, have nyented oertain new andUNITED STATES PATENT onlnon WILLIAM ANDERSON, 'oFMEMP-Hrs, TENNESSEE,ASSIGNOR TO A. A. STRANGE, or MEMPHIS,

rnnnnssnn.

SWITCH-LOCK.

Specificationof Letters resent.

, Patented June 16, 1908.

Application filed April 11, 1967. serial No. 367,601.

Beit known'that I, Wr'LmnMAnD RsoN, ,a citizen of the United States,residing at Shelbyand State useful Improvements in Switch-Locks; and Ido declare the following to be a full, clear, and exact. description ofthe invention, such as will enable others skilled the art to which it,appertains tom'ake and use the same."v V

This invention relates-to an improved key cannot be reposition.

One object of the invention is to provide a switch lock comprising asimple construction which'will reliably hold the lever for moving theswitch so that it cannot be moved eX.

cept by the'person who holds the key to the i lock.

YAn'o'ther object is to provide aswitch lock composed of-two members oneof which is always locked against movement when the '-'other is unlockedand vice versa,

In the accom anying drawings, Figure 1 represents a si e elevation ofthe switch Stand with this improved'lock applied thereto; Fig. 2represents a top plan view of the lock casing with the top removed toshov's the workingv vhich are in position to lock the "SWItGh operatinglever against movement llig. 3 represents a similar view with'th'working parts shown in-the positionv which they assume when theswitch lever is unlocked; Fig. 4 represents a longitudinal section takenon -line represents a perspectlve view of the s 1g. 6 represents aperspective view of the latch detached Fig.- 7 represents a bottom-planview.

of the cover; Fig. 8 shows the key used for locking. the device.

In the drawings is showna turn-table or; look casing 10 rotatablymounted on the upper side of a platform 1 by means of a shaft 2 to whichit is fixed. The shaft 2 passes loosely through the platform 1 andisconnected at its lower end with a lever for moving the switch points(not shown) and at it's top is provided with the usual signal (notshown). The lock casing 10 is provided with suitably shaped recesses inwhich are disposed the operating parts,.and with a detachable top 11.having a recess or chamber 44 of Fig. 3 .Fig." 5'

, oted to the casing is adapted to move.

A locking member orbolt 13 for the lever is mounted to slidetransversely in a recess in the casing lOand a coiled spring 14 isdisposed onits inner end on a guide pin 15, said spring bearing at oneend against a shoulder 16 on the member 13 and at its other endagainst-the casing wall. of this lever-locking member is preferably ofrectangular form and is provided with, a laterally-extending step-shapedblock or arm 19, the recess 20 thereof being adapted to engage the innerend of the lever 35 and lock it in raised position. This member 13alsois The body provided, at its upper end with a head 18 which lies onthe outside of the casing across an opening in the side wall thereofthrough which the member projects and slides. This locking member 13also has a stepped notch 21 in-its upper face for receiving a lockingbar or latch22. This bar 22 is pivoted at one end in a longitudinalrecess formed near-one side of the casing at right-. angles to the boltor looking member containing recess and extends across the top of thebolt 13. This bar 22 is bifurcated at its free end to receive a key 23for releasing it from the bolt. A spring 24 is attached to the top ofthe casing above the bar to hold said bar in engagement with thebolt-notch 21 .A key chamber 24 is formed beneath the free end of thelockingbar or latch 22 and has a key-hole26 opening throu h the sideWall of the casin through which t 'e key (not shown) is passed toliftthe bar 22 out of engagement with the bolt 13 and permit it to beushed in to release the lever 35, as hereina ter described.

' The arm or block 19 is adapted to-move in the path ofthe inner'end ofthe hand-lever 35 to lock the lever in vertical position in enrevent themanipulating of the switch. en it isdesired to manipulate the switch,the key23 is inserted throu hthe ke -hole 26 and given a half turn whiEraises t e bar 22 out of engagement with the bolt-notch 21 andpermits'said bolt to be pushed inward against the tension of its sprm 14and the lever 35 may then be raise am i operated. .One side of the lever35 when raised engages the inner edge of the arm and holds the lockingmember 13 in retracted position. and the tension of the spring of saidgagement with the platform 1 and thereby a the switch member tends toholdthe lever up. The lever, and means for releasing said member keycannot be removed from the lock while.

the-lever is elevated, a an I claim as my invention 5 1. A 'switch lock,comprising a casing, a lever pivoted to said casing having one lever,pivoted to said casing, a spring pressed end movable therein,.anapproximately L- bolt mounted to s'lide in saldcasing and hav shapedspring-pressed locking member with ing a laterallyprojecting arm ada tedtoiexthe short arm thereof movable-transversely ,tend transverselyacross the pat of said across the pathof said lever and having one leverin one position to lock said lever in. faceadapted to engage and locksaid lever lowered position, said arm being provided when the latter ism lowered position, and with means for irictionally engaging and theother face of said arm adapted to fricthe lever to be operated.

to (permit the locking member to be shifted 3. A .switchlock comprisinga casing, a

holding said lever in raised p'os1t1on, a locktionally engage one sideof the lever and hold ing bar for holding said bolt in forward posiit inengaged position, means for locking tion-in the p)ath of the lever, andmeans for said arm in engagement with said lever in raising said ar toclose said bolt and permit its lowered position, and means for releasingthe arm thereof-tdbe moved out of the path the said arm from said lever.I

of the lever. A .v v In'testimony whereof I have hereunto set 2. In aswitch rlo'ck, the combination of a my hand in presence of twosubscribing witcasing, a lever pivoted to said casmg,' an. nesses'.

- L-shaped locking member arran edzm said Y casing with its short armarran e to project WILL-1AM ANDERSON normally across the path of sailever to lock Witnesses'z' it in lowered position, means for lockingsaid M. A. CANDLER, member in said position in the path of the H. H.RAY.

